Die-stripper.



J. H, AMES. DIE sTR-IPPBR.

` APPLIOATION FILED MAY 11, 1909. 938,940. melma Nov. 2,1909.

B SHEBTS-SHBET 1.

J. H. AMES.

v DIE STRIPPER.

APPLICATION FILED MAY 11, 1909.

Patented Nov. 2, 1909.

3 SHEETS-SHEET 2.

O OOO WHW@ E. H. AMES.

DIE STRIPPER.

APPLIUATIQN FILED mm1, 1909.

'Patented Nov. 2, i909.

3 SHEETS-SHEET 3.

UNI-TED STATES PATENT OFFTE.

J OSEFH H. AMES, OF OAK PARK, ILLINOIS, ASSIGNOR TO AMERICAN CAR @t ".FOUNDRY COMPANY, OF CHICAGO. ILLINOIS, A CORPORATION OF NEW JERSEY.

DIE-STBII PER.

Specification of Letters Patent.

Patented Nov. 2., 1909.

Application filed May 11, 1999. Serial No. 495,348.

The stripper of the present invention isintended to be applied to and operated by a bulldozer adapted for heavy swaging'work; and the object of the invention is to so construct, arrange and operate the stripper that it will serve to act upon dies of various sizes, and may be adjusted to various positions within the bulldozer. f

A further object of the invention is to so construct the stripper that it will be suliil eiently 'strong and rigid to withstand the onerous conditions of heavy usao'e, and so that it maybe applied -to buldozers of standard type, Without radical change or modilication.

Further objects will appear from a def tailed description of the invention, which consistsin the features of coi'istruction and combination of parts hereinafter described and claimed.

ln the drawings, Figure l shows a bulldozer of standard type, with the dies applied thereto and the casin partly broken away to illustrate the connections for operating the stripper; Fig. 2 a top or plan'view ot' the same; Fig. 3 a rear end elevation of the same; and Fig. la sectional elevationA of one end of the bulldozer, showing the stripper connections and associated parts, taken on line Ll-Ll of Fig. of the arrow. v r

The. invention is appliedV to a bulldozer having a frame comprising,Y side Walls 5, a rear 'end wall 6, and rear cross abutments 7, reinforced by heavy ribs 8 which spring upwardly from the' base ofthe frame and constitute, in effect, extensions ot' the side- Walls, leaving between them an open space forv the accommodationv -of the stripping mechanism to be hereinafter described.. At the opposite end of the bulldozer' is journaled a power shaft 9 having keyed thereto a main gear Wheel 10 provided with a Wrist pin ll which serves to mount a crank arm 2, looking` in the direction I l2, the'forward end of which is pivoted to a ma e' die block 13 which carries a male die 14; The die block is slidably mounted on side guide rails l5. The main gear wheel is driven at the desired speed by a train of gearing` lo. The above features ane common to bulldozers ot standard formation, and need not be described With great particula-rity.

'In front or' the rear cross abutments is located a die backing frame 17, which restsA upon the side Walls of the bulldozer and comprises a straight faced inner Wall 1S, and a substantially straight faced outer Wall/19 'of less length than the inner Wall, and l.pro-

vided at its ends with oliset bosses 2() which linda bearing-` against the inner faces olt' the cross abutments.

' The inner and outer walls of the traine are connected by diagonally disposed end walls 2l, and by a plurality of cross ribs 22 ivhieh spring from a bottom lioor 9.3, as best shown .in Fig. 4. The construction is one which atlords great rigidity and strength and at the saine time serves to lighten the construction to the desired extent. The cross ribs 22 are slotted to receive a niain stripper bar 24 which vis adapted/to be moved back and forth with each operation of the ma chine. The main stripper' bar furnishes an extended connection for the attachment thereto of a suitable number or plunger bars '25, which extend inwardly from and at right Thelength of the main stripper bar is such y that the plunger bars can be attached. thereto at any desired point to accommodate the length or position of the female die, the frame of which is secured to the inner face of the die backing frame by means of bolts 29, the heads of which are entered within T slots 30 in the face ofthe inner Wall of the backing frame.

The main stripper frame has secured there" to and rearwardly extending therefrom side arms 31, the inner ends of which are bolted, or otherwise secured, to the main stripper bar, and the outer ends of which are fitted between ears on a hinged plate 33, protered therethrough the ends 3T of a bifurcated operating rod 38, which is provided with a turnbuclrle 39, for purposes of adjustment, the opposite end -of which operating rodis pivoted to an inverted Y lever iJfO, the arms of which are pivoted between ears 4:1, bolted or otherwise secured to the base of the bulldozer. The upwardly projecting stem of the Y lever is located in position to be engaged by the male die block 13 with each return movement, so as to impart a slight swing or oscillation to the Y lever as the bulldozer completes its return stroke.

In operation, theplate vof metal to be swaged is laid across the face of the female die frame, and the advance of the male die begins. The continued movement of the male die forces the metal into and against the false bottom of ,the female die, which, at

this stage of the operation, will be held inretracted position by the action ofr the coil spring 35, which forces back the hinged plate 33 and the main stripper bar, as shown in Figs.y l, 2 and it. On the return movement of the male die, the stripper bar will remain in normal position, as shown, until near the end of the return stroke, at which time the die block will engage the inverted stem of the Y lever 40 and draw Aforward the lever, vcarrying with it the rod 3S, which movement of the rod will swing forward the upper end of the hinged plate against the tension of the spring 35, thereby projecting the main stripper bar and with it the plunger bars which act upon the false bottom or bottoms of the female dies. The stroke of the plu'nger bars will beso regulated, by the turnbuckle, as to serve the purpose of stripping the work from the female die. The female die backing frame, on its inner or supporting face, is of a length greater than the Width of the bulldozer frame, so that die frames Varying greatly in length can. be

accommodated. At the same time the back` ing frame serves as a rigid filling block between the female'die frame and the cross abutmcnts, and further serves as a guide or support for the main stripper bar, which can be of a length sufficient to permit the force necessary in the stripping operatien to be directly applied to any desired portion of the female die.

The stripping mechanism is one which can be easily applied to bulldozers of the usual standard type, without substantial change or modification.

What I regard as new and desire to cure by Letters Patent is:

l. In combination with a bulldozer or the like, having a reciprocating male die block, a female backing frame and a female die secured thereto, a main stripper bar extending transversely of the machine and mounted secured thereto, a main stripper bar extendl ing transversely of the machine and mounted within the backing frame, a plunger bar connected with the main stripper bar and acting upon the bottom of the female die, arms connected with the center of the main stripper bar, a hinged plate to which the 'arms are pivoted, an operating vrod connected at one end to the plate and adapted to be drawn forward by the return movement of the male die block for actuating the stripper-bar, and a spring acting on the plate to hold the same' normally in retracted position,`said spring beingadapted to be compressed by the stripping movement of the plate, substantially as described.

3. In combination with a bulldozer or the.

like having a reciprocating malev die block, a female backing frame extending transversely of the bulldozer and of a length to have its ends outwardly project laterally l beyond they frame of the bulldozer, a female die secured thereto, a main stripper bar extending transversely of the machine and mounted Within the backing frame, a plunger bar connected with the main stripper bar and acting upon the bottom of the female die, an arm connected with the main stripper bar near its center, and connections between said arm and the'mounting for the male die block, for actuating the stripper bar with the return movement of the. male die block, substantially as described.

4. In combination with a bulldozer or the like having a reciprocating male die block, a. female backing frame extending transversely of the bulldozer and cfa length to have its ends outwardly project laterally beyond the frame of the bulldozer, a female die secured thereto, a main stripper bar extending transversely of the machine and mounted within the backing frame, a plunger bar connected with the main s-trippeibar and acting upnfx die block, for actuating the stripper bar, the bottoni of the fenmlo die, un nun con-d snbstnntially as described.

nected with the n'min stripper bai' nem.' its center, a hinged plate to which the :uni is E JOSEPH H' AMES' pivoled, and im operating' rod connected at y Witnesses: y one end to the plate and adapted to be drawn D. A. CRAWFORD, forward by the ivlnln movement of the nml@ i A. L. CANAVAN. 

